odoo中Python实现小写金额转换为大写金额

自动将小写的金额数值转换为大写，方便记录

class project_parm(models.Model):

def IIf(self, b, s1, s2):
    if b:
        return s1
    else:
        return s2
def num2chn(self,nin=None):
    cs =('零','壹','贰','叁','肆','伍','陆','柒','捌','玖','◇','分','角','圆','拾','佰','仟','万','拾','佰','仟','亿','拾','佰','仟','万')
    st = ''
    st1=''
    s = '%0.2f' % (nin)
    sln =len(s)
    if sln >15:
        return None
    fg = (nin<1)
    for i in range(0, sln-3):
        ns = ord(s[sln-i-4]) - ord('0')
        st= self.IIf((ns==0)and(fg or (i==8)or(i==4)or(i==0)), '', cs[ns]) + self.IIf((ns==0)and((i<>8)and(i<>4)and(i<>0)or fg and(i==0)),'', cs[i+13])+ st
        fg = (ns==0)
    fg = False
    for i in [1,2]:
        ns = ord(s[sln-i]) - ord('0')
        st1 = self.IIf((ns==0)and((i==1)or(i==2)and(fg or (nin<1))), '', cs[ns])+ self.IIf((ns>0), cs[i+10], self.IIf((i==2) or fg, '', '整'))+ st1
        fg = (ns==0)
    st.replace('亿万','万')
    return self.IIf( nin==0, '零', st + st1)

amount_in_figures = fields.Float(string='项目金额', digits=(16, 2), required=True)
amount_in_words = fields.Char(string='大写金额', readonly=True)

@api.model
def create(self, vals):
    vals['amount_in_words'] =   self.num2chn(vals['amount_in_figures'])
    return super(project_parm, self).create(vals)